Improvement in head-blocks for saw-mills



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OYRUS E. GRANDY, 0F UPj-TON ASSIGNOR TO S. HEALD & SON S, 'OF BARRE,

. MASSACHUSETTS.

Letters Patent No. 103,871, dated June 7, 1870.

IMPROVEMENT IN' HEAD-BLOCKS FOR SAW-MILLS.

The Schedule referred tio in these Letters Patent vand. making part ofthe same.

To all whom it may concern:

Be it known that I, 'CYRUs E. GRANDY, of Upton, in the county of Worcester and vState of Massachusetts, have inwented a new and useful Improvement in-Circular-Saw Mills; and I do hereby declare that the following is a full, clear, `and exact desclption thereof, which wil'i enable others skilled-in the art to make and use the same, reference-,being had to the accompanying drawing forming partfot this speciiication.

Figure 1 isa top View of my improved attachment.

Figure 2 is a side view of the same.

Figure 3 is an end viewof the same, partiy in section, through the line at x, 13g, 1.

Figure 4 is a detail view of the under side of the knee, showin'g the index.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved 4attachment for the frames of circular-saw mills in front of the saw, of that kind which areso constructed and arrangedv that, while supporting the side of the log from vwhich 'the board or other lumber is being cnt as it is being carried past it by the car^ riage, it may also'serve as a set-gauge when setting up the-log for another out; and

Itconsistsin the construction and combination of the various parts of the device as hereinafter more fully described.

. A is a frame, to the ends ofwhich are attached bearings a', in which revolve the journals of the screw B .One of the bearings a' is left -looseso that it may be forced down by a lever-cam C to clamp the journal of thescrew B, and thus prevent it from being turned by the friction of v.the knee when the said knee is being turned down or up.

.lo the projecting end of the outer journal Yof the swiveled screw B is attached a crank, D, by means of lwhich the said screw 'is turned to move the knee E back and forth.

' The knee E has a screw-hole formed through it for vthe passage ofthe screw B, so that the said knee .may be adjusted according to the thickness of the strip or board'tefbe sawn from the 10g, by turning the said screw. l

In the side ot'ftheknee E, toward'the log, is pivoted a roller, F,`against which the 10g rests as the said log is being carried forward to the saw.

The knee E is held up to its place bythe pressure and friction of the 10g against the roller F as the said log is being carried forward by the carriage.

To the short or horizontal armof the knee is adjust-ably attached an index, G, which points' to scale, H, of division marks formedmpon or attached to the npwardly-projecting side bar of the frame A, as shown in figs. 1 and 3. By this construction the knee E may be turned down ont of the way until the first cnt or slab has been sawn from the log, and then turned up to its place for the squared side of the 10g to rest against, and move along as the log lis carried. forward to the saw by the carriage. The device thus supports the forward sider of the log and prevents all rolling and canting, and it also acts as a up to the saw.

'Havin g thus described my invention,

I claim as new and desire to secure hy Letters Pat,

ent-

lhe frame A, providedwith the scale H, swiveled screw B, crank D, cam-lever C, loose bearing-cap a', knee E, roller F, and adjustable index g, all said parts constructed and arranged as shown and described.

. CYRUS E. GRANDY.

Witnesses:

GEO. O. DAVIS, L. E. DENNIS.'

gauge in setting the'log 

